County annual report · FIPS 33005
2020 Cheshire County, NH Power Outage Report
In 2020, customers in Cheshire County, NH went without power for an average of 9.4 hours, a total of 339K customer-hours (New Hampshire average 7.1 hours). That ranks 5th worst of 10 New Hampshire counties and 835th of 3,019 nationally.
Compared with NH, the US and 2019
Coverage line is EAGLE-I's share of New Hampshire customers tracked each year.
Biggest outages in Cheshire County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 4, 2020 20:30 | August 8, 2020 10:00 | 3d 13h | 9,447 | 146K |
| 2 | July 8, 2020 18:45 | July 9, 2020 09:00 | 14h 15m | 7,751 | 4,627 |
| 3 | May 15, 2020 23:45 | May 17, 2020 02:00 | 1d 2h | 2,876 | 14K |
| 4 | December 5, 2020 17:15 | December 8, 2020 10:00 | 2d 16h | 2,611 | 58K |
| 5 | February 7, 2020 15:00 | February 9, 2020 02:00 | 1d 11h | 2,159 | 24K |
| 6 | September 30, 2020 02:15 | October 1, 2020 01:00 | 22h 45m | 1,979 | 12K |
| 7 | October 7, 2020 21:15 | October 8, 2020 19:30 | 22h 15m | 1,859 | 8,497 |
| 8 | August 23, 2020 17:15 | August 24, 2020 13:15 | 20h | 1,637 | 8,513 |
| 9 | December 19, 2020 08:30 | December 19, 2020 11:30 | 3h | 1,112 | 1,365 |
| 10 | March 21, 2020 02:15 | March 21, 2020 03:00 | 45m | 1,070 | 268 |
Outage episodes by size in 2020: 77 reached 100+ customers, 10 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Cheshire County reported on EIA Form 861 for 2020, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Public Service Co of NH | 2020 | 7.7 hrs | 1.49 | 1.6 hrs | 0.81 |
| Liberty Utilities (Granite State Electri | 2020 | 2.5 hrs | 1.18 | 1.7 hrs | 0.99 |
| New Hampshire Elec Coop Inc | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 99% of New Hampshire's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 36,014 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Cheshire County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cheshire County, NH annual power outage report, 2020, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2020/new-hampshire/cheshire-county